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package imaging.framework;
import java.awt.*;
import java.awt.image.*;
import java.net.*;
import java.io.*;
/******************************************************
* Future idea:
*
* Create a smart button class with an invoke method that's
* to be called when the button is pressed.
*
* Subclasses override the invoke method to define
* specific behavior.
*
* That would allow things like load and save frames
* to be almost exactly the same -- one could inherit
* from the other and override addButtons, etc
*****************************************************/
class LoadURLFrame extends Frame
{
public LoadURLFrame (String title, ImageApp parent)
{
super (title);
this.parent_ = parent;
this.resize (500,130);
this.addButtons();
}
private void addButtons()
{
this.setLayout (new BorderLayout ());
Panel textPanel = new Panel ();
textPanel.setLayout (new BorderLayout ());
textPanel.add ("North", new Label ("Image Location:"));
textPanel.add ("Center", this.openURLText_);
Panel buttonPanel = new Panel ();
buttonPanel.setLayout (new FlowLayout (FlowLayout.CENTER));
buttonPanel.add (this.openButton_);
buttonPanel.add (this.clearButton_);
buttonPanel.add (this.cancelButton_);
this.add ("North", textPanel);
this.add ("South", buttonPanel);
}
private int browseFiles (String url)
{
fileBrowser_ = new FileBrowser ("Browse", this.parent_);
ListFiles list = new ListFiles (this.fileBrowser_, this.parent_);
return this.fileBrowser_.initialize (url, list);
}
// Handle all action events
public boolean action (Event e, Object arg)
{
if (e.target instanceof Button)
{
if (e.target == this.openButton_)
{
this.getURL ();
}
else if (e.target == this.clearButton_)
{
this.openURLText_.setText (new String ());
this.openURLText_.requestFocus ();
}
else if (e.target == this.cancelButton_)
this.dispose ();
validate ();
return true;
}
else
return false;
}
public boolean keyDown (Event e, int key)
{
if (key == 10)
{
this.getURL ();
return true;
}
else
return false;
}
private void getURL ()
{
this.hide ();
String url = this.openURLText_.getText ();
this.dispose ();
// The following is only for debugging
if (url.compareTo ("ru") == 0)
url = "http://www.cs/~pjain/gifs/";
else if (url.compareTo ("pj") == 0)
url = "http://www.cs/~pjain/myphoto.gif";
if (!url.endsWith ("/") &&
(this.parent_.openURL (url) != -1)) // Try to open it as an image
return;
else
{
ListFiles list = new ListFiles ();
switch (this.browseFiles (url))
{
case 1:
this.fileBrowser_.show ();
break;
case 0:
DialogManager.popDialog (DialogType.MALFORMED_URL,
"Error: Directory contains index.html");
break;
default:
DialogManager.popDialog (DialogType.MALFORMED_URL,
"Error: Not a valid image or URL not found");
break;
}
}
}
// Create the Open URL Frame and also the buttons which appear in
// it
private Button openButton_ = new Button ("Open");
private Button clearButton_ = new Button ("Clear");
private Button cancelButton_ = new Button ("Cancel");
private TextField openURLText_ = new TextField (40);
private FileBrowser fileBrowser_ = null;
private ImageApp parent_;
}
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